11.   Despite strenuous efforts to disguise it, her hostility was showing.

12.   In a strenuous effort, she dragged her mind back to the present.

13.   During the last five months he has made a strenuous effort to get to know the area and the residents of this constituency of contrasts.

14.   Despite the strenuous efforts that were made each time to prevent them, accidents would happen.

15.   In the context of deregulated bus services, it was important that strenuous efforts at informal co-ordination between bus operators and local planning authorities should be encouraged.

16.   Although exhausted from these strenuous efforts, I do not flop in front of the television or indulge in a soothing bath.

17.   Although he spent the weekend apologizing and saying that he had been quoted out of context, his strenuous efforts to keep his job ultimately proved unsuccessful.

18.   Brandeis has trouble attracting African-Americans despite strenuous efforts to do so, including two programs that bring inner-city youths to campus.

19.   After strenuous efforts, the elimination of weapons was nearly complete.

20.   Boyle tries everything from a fantasy dance sequence to stop-motion animation in a strenuous effort to add fizz.